Chemical Change

Question: How do scientists determine exactly how much product a chemical reaction will make?

Essential Ideas: 

• Chemical reactions involve the rearrangement of atoms, but atoms are never created or destroyed. 

• Moles, mass, and chemical equations allow us to predict the amounts of substances involved in reactions

• The concept of limiting reactants determines reaction efficiency in both laboratory and industrial contexts

Learning Objectives 

1. Deduce balanced chemical equations from given information.

2. Explain why the number of each type of atom stays the same before and after a chemical reaction, showing that mass is conserved.

3. Describe why balancing chemical equations is important for accurately predicting and controlling chemical reactions in the real world.

4. Conduct experiments demonstrating the conservation of mass in chemical reactions. Decomposition of magnesium carbonate

Stoichiometry and Mole Calculations

5. Calculate the mole and mass relationships of reactants and products using coefficients from balanced chemical equations.

6. Apply the concept of the mole and molar mass in stoichiometric calculations.

7. Convert between mass and moles using molar mass.

8. Solve mass-to-mass conversion problems using stoichiometry.

9. Analyze real-world applications of stoichiometry in industrial and environmental contexts.

Limiting Reactants

10. Define the term limiting reactant (reagent) and explain its significance in chemical reactions.

11. Use mole ratios to identify the limiting reactant in a chemical reaction.

12. Calculate the mass of products formed based on the limiting reactant.

13. Explore the impact of limiting reactants in industrial and environmental chemistry.